Filtering element.



K. KIEFER.

HLTBRING ELEMENT.

APPLIGLTIO!" FILED JUIE 5B. 1905.

' FIG. 1

PATENTED DEG. 4, 1906.

Witnesses. i. v mj Innen tof.

UNITED STATES PATENT OFFICE.

KARL KIEFER, OF UINClNNATI, OHIO.

FILTERING ELEMENT.

No. 837,845. Original application filed Mai-cli 6, 1903, Serial No. 2146,596.

To (di whom it may concern:

Be it known that I, KARL KIEFER, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Iniprovement in Filterin Elements, of which the following is a specication.

This is a divisional a plication divided from my application, Serial) No. 146,596, filed March 6 1903, for filtering apparatus.

The object of this invention is to produce a si le-pan liquid conductor that takes up litt e s ace in the iilter a paratus and can be easily uilt and operated.)

The invention is illustrated in the accompanying drawings, of Which- Figure 1 shows two superposed pans in cross-section filled with filter mass. Fig. 2 Shows in plan part of Lthe pan with filter mass and screen removed. Fig. 3 shows a crosssection from one of the pans at a fliflerent plane of section than Fig. 1.

The pan consists of a sheet-metal body D, a cast-metal hub B, the latter with perforations H, terminating in a large central hole.

W is a screen of' the lcnd I have termed fiber retaining, about one-sixteenth inch thick and from forty to fifty wires to the inch, commonly Woven in the style which is called twilled."

9 is a horizontal and protruding ringshaped surface connected to the hub B.

9' is a peripheral protrudi surface connected to the sheet-metal part The ringshaped space between the two is filled out by the wire screen W. The filter mass is called I. Channels 15 are punched into the sheet-metal part of the pan, as shown in all the figures, and are plainly visible in crosssection in Fig. 3.

The fiber-retaining screen W is in contact with the plane part ofthe an, and the liquid that issues clear from the ter-layer I moves between the ca illa conduits produced by means of the p ane ottoni of the pan and the meshes of the mentioned screen and in some filters would be sufficient to deliver all the filtered liquid to the lteri -pan through the holes H. If an especially arge machine Specification of Letters Patent.

Bivided and this application tiled June 28, 1905. Serial No. 268.642.

Patented Dec. 4, 1906.

is to be made, and for a very easgT outlet, these grooves 15 are additional means for conducting the liquid to the center. They fulfil in construction, as shown, another purpose, and this is the pressing of the filter layer I beneath the pan against the ring-sha ed surfaces 9 and 9 and the filterin -mat of the lower neighboring pan and o viates the use of coarse-wire screens.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. In a filter, the combination of a diskshaped filtering layer of compressed fibrcuS pulp, within a pan having a vertical border, a eripheral and horizontal surface of a Wi th at least as wide as the thickness of the filtering layer at its edge, such surface parts tightly connected to said vertical border, said pan having a ribbed bottom and a berretaining mat, the latter in contact with such ribbed bottom and filtering layer.

2. In a filter, the combination of a diskshaped filtering layer of compressed fibrous pulp, Within a pan having a vertical border, a eripheral and horizontal surface of a Wi th at least as wide as the thickness of the filtering layer at its edge, suoli surface parts tightly connected to said vertical border, said pan having a corrugated bottom and open-work mats on both sides of such corrugated bottom.

3. In a filter, the combination of a diskshaped filtering layer oLcompressed fibrous pulp, within a pan having a vertical border, a eripheral and horizontal surface of a wi th at least as wide as the thickness of the filtering layer at its edge, such surface parts tightly connected to said vertical border, said pan having a corrugated im erforate bottom and open-Work mats on bot sides of such corrugated bottom.

In testimony whereof I have signed my naine to this specification in the presence of two subscribing witnesses.

KARL KIEFER.

Witnesses E. J. ArPLEToN. G. W. Wnnnm 

